BY GARRY SPRINGGAY 4 OHM POWER VS THD+N @ 1000 · PDF file125 x 4 @ 4 Ω 94 x 1 @ 4...
2
AudioControl.com @AudioControlInc @AudioControlInc AudioControl AudioControl is a piece of cake. Also internally connected to the high level inputs is the GTO signal sensing turn on circuitry, which can be used to turn the amp on and off in the absence of a dedicated remote-on wire. The amp has two pairs of RCA inputs and a pair of RCA outputs to feed a second amplifier. The amplifier is equipped with an adjustable 30-300Hz Linkwitz- Riley high pass crossover for the front channels, while the rear channels have the same frequen- cies and alignment, but can be set for either high or low pass. Both sets of channels can be individually set for stereo or mono operation as well, which is handy when using the amp in bridged mode. When it comes time to set the gains, AudioControl has come up with a clever assistant in the form of their MILC™ or “Maximum Input Level Control” circuit. This patent- pending circuit is designed to warn the tuner of unwanted clipping or distortion. Three LED’s provide in- formation on the maximum levels for clean input signal and amp gain settings. Also part of the tuning process is the setup of AudioCon- trol’s patented AccuBASS® circuit, which provides compensation for the bass roll-off in many factory systems, and restores the full rich sound of your music. An optional ACR-1 remote con- trol can be used as a master level control or to provide level control of the low level outputs. Listening Always my favorite part of the review process, I connected the LC-4.800 to a twelve inch woofer and a pair of ultra high end 6.5” component speakers in custom cabinets. The internal crossovers were used to set the sub to about 80Hz, and the stereo speakers at around 50Hz. From the outset the LC-4.800 sounded transpar- ent and offered no obvious sonic signature of its own. To quote the famous Stewart Hegeman line, it’s like “a straight wire with gain”. This is precisely what a good am- plifier should do; simply amplify the signal, without adding any noise or alteration of the music. I listened to a few favorite tracks including the complex and detailed “A Day in Tunisia” by Spies, and “Ride of the Valkyries” by The Cin- cinnati Pops. Both of these tracks sounded very realistic and lifelike, with all of the apparent energy and airiness in these amazing old Telarc recordings. And it was with these tracks I noted the level of de- tail and sense of space the Audio- Control amp managed to produce. Don Dorsey’s synthesizer work and a Neil Peart drum solo proved that the LC-4.800 amp had good control of the loudspeakers. Even at high volumes there was no sign of ringing or overhang in Peart's always amazing drum work and the sound was tight and accurate, with the dry decay of Don’s synth being reproduced realistically. The stereo image was also excellent and the previously mentioned sense of space made things almost three dimensional. AMPLIFIER Signal to Noise Ratio referenced to 2V output. (CEA-2006A) (1 watt @ 4 ohms) -73.0dBA Signal to Noise Ratio referenced to full output. -93.9dBA THD+N at rated power <1.0% Maximum Efficiency at full 2 ohm power per ch. 75.0% Idle Current 1.2A Input Sensitivity 260mV - >20V Maximum Current @ full power, lowest rated impedance 76.3A Frequency Response (-3dB) 27Hz – 34.0Hz High Pass Crossover 30Hz – 300Hz -12dB/oct Low Pass Crossover 30Hz – 300Hz -12dB/oct Bass EQ boost (Max) +22dB @ 58Hz TECHNICAL DATA BY GARRY SPRINGGAY TEST REPORT AMPLIFIER MEASURED PERFORMANCE SPECIFICATIONS Manufacturers Rated Power Actual Measured Power @ 1.0% THD+N @ 12.6 V Battery Actual Measured Power @ 1.0% THD+N @ 14.4 V Battery 125 x 4 @ 4 Ω 94 x 1 @ 4 Ω 126 x 4 @ 4 Ω 200 x 4 @ 2 Ω 159 x 1 @ 2 Ω 206 x 4 @ 2 Ω 400 x 2 @ 4 Ω 325 x 2 @ 4 Ω 424 x 2 @ 4 Ω TECHNICAL DATA The following power measurements were obtained using industry standard methods. (100 HZ @ 1.0% THD+N - Battery voltages shown +/- 0.2 V) You asked and Audiocontrol delivered. Simplifying OEM integration with the newest multi-channel amplifier. AudioControl LC-4.800 Amplifier Review a four channel Class D amplifier with some innovative and unique features. It is rated at 125 watts per channel into four ohms, and 200 watts per channel into two ohms. Capable of operating in 4, 3, or 2 channel mode makes the LC-4.800 a flexible platform for many system designs. Connections are all made on the front edge of the amplifier, and the controls and adjustments are made from the top by remov- ing the aluminum top cover. This overall design promotes ease of installation and tuning, since the wires are easier to hide and there is no need to do a lip stand on the n response to an over- whelming amount of requests from their dealers, AudioControl has introduced a new line of multi-channel amplifiers designed to make OEM integration simple and easy, as well as bringing proven AudioControl technologies like AccuBASS® and GTO signal sensing directly to the amplifiers. We wanted to have a look for ourselves, so they were kind enough to send one of the new LC-4.800 multi-channel amps for us to mess around with. Features and Construction The AudioControl LC-4.800 is floor mat to find the controls. One of the features that immediately caught my attention was the con- nections for six high level input channels instead of the usual four. To make OEM integration simpler, the LC-4.800 has an additional pair of high level, high frequency inputs that are already internally summed to the front outputs. These are designed to be driven with the cars tweeter outputs, while the “normal” front inputs obtain signal from the front midrange channels of the OEM system. A separate level control is provided for the high fre- quency front inputs so getting the balance of high to mid frequencies “THE AUDIOCONTROL LC-4.800 IS A FOUR CHANNEL CLASS D AMPLIFER WITH SOME INNOVATIVE AND UNIQUE FEATURES.” I AS SEEN IN THE PASMAG JUNE/JULY BOOST AND SWAP ISSUE SPRING BREAK NATIONALS’ 30TH ANNIVERSARY ARMANDO VILLARREAL’S WRX STI GIOVANNY AYALA’S EVO X + ONLY $4.99! SHOW TURNED TRACK MITSUBISHI EVO X E55 SWAPPED MERCEDES CLS T E S T E D: AU DIOCO NTROLLC-4.80 0 A M P SWAP BOOST LC-4.800 REVIEWED FRANKENSTEIN ROTARY AUDIOCONTROL’S GAME CHANGING NEW AMPLIFIER RX-7 & FEATURED EVENT #TBGLIVE WINNERS CANADA’S SOURCE FOR MODIFIED CAR CULTURE Cogent Audio Labs AUDIO CONTROL LC-4.800 CROSSOVER RANGE - FREQUENCY RESPONSE ref - 2.0V @ 4 Ohms -40 +6 -38 -36 -34 -32 -30 -28 -26 -24 -22 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 -0 +2 +4 d B r 10 40k 20 50 100 200 500 1k 2k 5k 10k 20k Hz Cogent Audio Labs AUDIO CONTROL LC-4.800 BRIDGED 4 OHM POWER vs THD+N 1000 Hz 14.4V Batt 0.001 10 0.002 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 % 1 1k 2 5 10 20 50 100 200 500 W Cogent Audio Labs AUDIO CONTROL LC-4.800 MAXIMALLY FLAT - FREQUENCY RESPONSE ref - 2.0V @ 4 Ohm s -18 +6 -17 -16 -15 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 -0 +1 +2 +3 +4 +5 d B r 10 40k 20 50 100 200 500 1k 2k 5k 10k 20k Hz Cogent Audio Labs AUDIO CONTROL LC-4.800 2 OHM POWER vs THD+N 1000 Hz 14.4V Batt 0.001 10 0.002 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 % 2 1k 5 10 20 50 100 200 500 W Cogent Audio Labs AUDIO CONTROL LC-4.800 4 OHM POWER vs THD+N 1000 Hz 14.4V Batt 0.001 10 0.002 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 % 100m 1k 200m 500m 1 2 5 10 20 50 100 200 500 W CROSSOVER RANGE - FREQUENCY RESPONSE BRIDGED 4 OHM POWER VS THD+N MAX FLAT - FREQUENCY RESPONSE 2 OHM POWER VS THD+N @ 1000 HZ 14.4V BATT 4 OHM POWER VS THD+N @ 1000 HZ 14.4V BATT PAS_2016_JuneJuly_137_TR_AudioControl_LC-4.800_REPRINT.indd 3-4 2016-05-26 2:39 PM
Transcript of BY GARRY SPRINGGAY 4 OHM POWER VS THD+N @ 1000 · PDF file125 x 4 @ 4 Ω 94 x 1 @ 4...
AudioControl.com @AudioControlInc @AudioControlInc AudioControl AudioControl
is a piece of cake. Also internally connected to the high level inputs is the GTO signal sensing turn on circuitry, which can be used to turn the amp on and off in the absence of a dedicated remote-on wire.
The amp has two pairs of RCA inputs and a pair of RCA outputs to feed a second amplifier.
The amplifier is equipped with an adjustable 30-300Hz Linkwitz-Riley high pass crossover for the front channels, while the rear channels have the same frequen-cies and alignment, but can be set for either high or low pass. Both sets of channels can be individually set for stereo or mono operation as well, which is handy when using the amp in bridged mode. When it comes time to set the gains, AudioControl has come up with a clever assistant in the form of their MILC™ or “Maximum Input Level Control” circuit. This patent-pending circuit is designed to warn the tuner of unwanted clipping or distortion. Three LED’s provide in-formation on the maximum levels for clean input signal and amp gain settings. Also part of the tuning process is the setup of AudioCon-trol’s patented AccuBASS® circuit, which provides compensation for the bass roll-off in many factory systems, and restores the full rich sound of your music.
An optional ACR-1 remote con-trol can be used as a master level control or to provide level control of the low level outputs.
ListeningAlways my favorite part of the
review process, I connected the
LC-4.800 to a twelve inch woofer and a pair of ultra high end 6.5” component speakers in custom cabinets. The internal crossovers were used to set the sub to about 80Hz, and the stereo speakers at around 50Hz. From the outset the LC-4.800 sounded transpar-ent and offered no obvious sonic signature of its own. To quote the famous Stewart Hegeman line, it’s like “a straight wire with gain”. This is precisely what a good am-plifier should do; simply amplify the signal, without adding any noise or alteration of the music.
I listened to a few favorite tracks including the complex and detailed “A Day in Tunisia” by Spies, and “Ride of the Valkyries” by The Cin-cinnati Pops. Both of these tracks
sounded very realistic and lifelike, with all of the apparent energy and airiness in these amazing old Telarc recordings. And it was with these tracks I noted the level of de-tail and sense of space the Audio-Control amp managed to produce. Don Dorsey’s synthesizer work and a Neil Peart drum solo proved that the LC-4.800 amp had good control of the loudspeakers. Even at high volumes there was no sign of ringing or overhang in Peart's always amazing drum work and the sound was tight and accurate, with the dry decay of Don’s synth being reproduced realistically. The stereo image was also excellent and the previously mentioned sense of space made things almost three dimensional.
AMPLIFIER
Signal to Noise Ratio referenced to 2V output. (CEA-2006A) (1 watt @ 4 ohms) -73.0dBA
Signal to Noise Ratio referenced to full output. -93.9dBA
THD+N at rated power <1.0%
Maximum Efficiency at full 2 ohm power per ch. 75.0%
Idle Current 1.2A
Input Sensitivity 260mV - >20V
Maximum Current @ full power, lowest rated impedance 76.3A
Frequency Response (-3dB) 27Hz – 34.0Hz
High Pass Crossover 30Hz – 300Hz -12dB/oct
Low Pass Crossover 30Hz – 300Hz -12dB/oct
Bass EQ boost (Max) +22dB @ 58Hz
TECHNICAL DATA
BY GARRY SPRINGGAY TEST REPORT
AMPLIFIER MEASURED PERFORMANCE SPECIFICATIONS
Manufacturers Rated Power
Actual Measured Power @ 1.0% THD+N
@ 12.6 V Battery
Actual Measured Power @ 1.0% THD+N
@ 14.4 V Battery
125 x 4 @ 4 Ω 94 x 1 @ 4 Ω 126 x 4 @ 4 Ω
200 x 4 @ 2 Ω 159 x 1 @ 2 Ω 206 x 4 @ 2 Ω
400 x 2 @ 4 Ω 325 x 2 @ 4 Ω 424 x 2 @ 4 Ω
TECHNICALDATA
The following power measurements
were obtained using industry standard methods. (100 HZ
@ 1.0% THD+N - Battery voltages shown +/- 0.2 V)
You asked and Audiocontrol
delivered. Simplifying
OEM integration with the newest
multi-channel amplifier.
AudioControl LC-4.800AmplifierReview
a four channel Class D amplifier with some innovative and unique features. It is rated at 125 watts per channel into four ohms, and 200 watts per channel into two ohms. Capable of operating in 4, 3, or 2 channel mode makes the LC-4.800 a flexible platform for many system designs.
Connections are all made on the front edge of the amplifier, and the controls and adjustments are made from the top by remov-ing the aluminum top cover. This overall design promotes ease of installation and tuning, since the wires are easier to hide and there is no need to do a lip stand on the
n response to an over-whelming amount of requests from their dealers,
AudioControl has introduced a new line of multi-channel amplifiers designed to make OEM integration simple and easy, as well as bringing proven AudioControl technologies like AccuBASS® and GTO signal sensing directly to the amplifiers.
We wanted to have a look for ourselves, so they were kind enough to send one of the new LC-4.800 multi-channel amps for us to mess around with.
Features and ConstructionThe AudioControl LC-4.800 is
floor mat to find the controls. One of the features that immediately caught my attention was the con-nections for six high level input channels instead of the usual four. To make OEM integration simpler, the LC-4.800 has an additional pair of high level, high frequency inputs that are already internally summed to the front outputs. These are designed to be driven with the cars tweeter outputs, while the “normal” front inputs obtain signal from the front midrange channels of the OEM system. A separate level control is provided for the high fre-quency front inputs so getting the balance of high to mid frequencies
“THE AUDIOCONTROL
LC-4.800 IS A FOUR CHANNEL
CLASS D AMPLIFER
WITH SOME INNOVATIVE AND UNIQUE
FEATURES.”
I
AS SEEN IN THE PASMAG JUNE/JULY BOOST AND SWAP ISSUE
SPRING BREAK NATIONALS’ 30TH ANNIVERSARY
ARMANDO VILLARREAL’S
WRX STI
GIOVANNY AYALA’S
EVO X
+
ONLY
$4.99!
SHOW TURNED TRACK MITSUBISHI EVO X
E55 SWAPPED MERCEDES CLS
TESTED: AUDIOCONTROL LC-4.800 A
MP
SWAPBOOST
LC-4.800 REVIEWED
FRANKENSTEINROTARY
AUDIOCONTROL’SGAME CHANGING
NEW AMPLIFIER
RX-7
&
FEATURED EVENT
#TBGLIVE WINNERS
CANADA’S SOURCE FOR MODIFIED CAR CULTURE
PASM
AG.CO
MPM
4006
9655
R
1076
0
Dis
play
Unt
il 07
/15/
16
JUNE/JULY 2016 - $4.99
PAS_2016_137_June-July_Cover.indd 1 2016-05-25 4:11 PM
Cogent Audio Labs CROSSOVER RANGE - FREQUENCY RESPONSE
AUDIO CONTROL LC-4.800 CROSSOVER RANGE - FREQUENCY RESPONSE ref - 2.0V @ 4 Ohms
-40
+6
-38
-36
-34
-32
-30
-28
-26
-24
-22
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
-0
+2
+4
dBr
10 40k20 50 100 200 500 1k 2k 5k 10k 20kHz
Cogent Audio Labs BRIDGED 4 OHM POWER vs THD+N @ 1000 Hz 14.4V Batt
AUDIO CONTROL LC-4.800 BRIDGED 4 OHM POWER vs THD+N 1000 Hz 14.4V Batt
0.001
10
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
%
1 1k2 5 10 20 50 100 200 500W
Cogent Audio Labs MAX FLAT - FREQUENCY RESPONSE
AUDIO CONTROL LC-4.800 MAXIMALLY FLAT - FREQUENCY RESPONSE ref - 2.0V @ 4 Ohms
-18
+6
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
-0
+1
+2
+3
+4
+5
dBr
10 40k20 50 100 200 500 1k 2k 5k 10k 20kHz
Cogent Audio Labs 2 OHM POWER vs THD+N @ 1000 Hz 14.4V Batt
AUDIO CONTROL LC-4.800 2 OHM POWER vs THD+N 1000 Hz 14.4V Batt
0.001
10
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
%
2 1k5 10 20 50 100 200 500W
Cogent Audio Labs 4 OHM POWER vs THD+N @ 1000 Hz 14.4V Batt
AUDIO CONTROL LC-4.800 4 OHM POWER vs THD+N 1000 Hz 14.4V Batt
0.001
10
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
%
100m 1k200m 500m 1 2 5 10 20 50 100 200 500W
CROSSOVER RANGE - FREQUENCY RESPONSE
BRIDGED 4 OHM POWER VS THD+N
MAX FLAT - FREQUENCY RESPONSE
2 OHM POWER VS THD+N @ 1000 HZ 14.4V BATT
4 OHM POWER VS THD+N @ 1000 HZ 14.4V BATT
PAS_2016_JuneJuly_137_TR_AudioControl_LC-4.800_REPRINT.indd 3-4 2016-05-26 2:39 PM
AudioControl.com @AudioControlInc @AudioControlInc AudioControl AudioControl
TEST REPORT AudioControl LC-4.800
Performance/Bench Measurements
Moving to the test bench, I went through the normal battery of tests, pushing the amp to its absolute perfor-mance limits, and recording the data. Throughout my testing it measured favor-ably in all respects. The amp turned on and off without pops or thumps, and when I did nasty things to it, like dead shorting the outputs at high power it simply protected and then worked properly again when reset. No fuss, no drama, and best of all, no failures.
SPRING BREAK NATIONALS’ 30TH ANNIVERSARY
ARMANDO VILLARREAL’S
WRX STI
GIOVANNY AYALA’S
EVO X
+
ONLY
$4.99!
SHOW TURNED TRACK MITSUBISHI EVO X
E55 SWAPPED MERCEDES CLS
TESTED: AUDIOCONTROL LC-4.800 A
MP
SWAPBOOST
LC-4.800 REVIEWED
FRANKENSTEINROTARY
AUDIOCONTROL’SGAME CHANGING
NEW AMPLIFIER
RX-7
&
FEATURED EVENT
#TBGLIVE WINNERS
CANADA’S SOURCE FOR MODIFIED CAR CULTURE
PASM
AG.CO
MPM
4006
9655
R
1076
0
Dis
play
Unt
il 07
/15/
16
JUNE/JULY 2016 - $4.99
PAS_2016_137_June-July_Cover.indd 1 2016-05-25 4:11 PM
425.775.8461www.audiocontrol.com
MULTI-CHANNEL DSP MATRIX PROCESSORS | PREMIUM OEM INTEGRATION | ACCUBASS® PROCESSING | SPEAKER LEVEL AND LINE LEVEL INPUTS | DIGITAL COAX AND OPTICAL INPUTS | ASSIGNABLE REMOTE LEVEL CONTROL
PREMIUM DSP MATRIX PROCESSORS
TAKE CONTROL WITH INCLUDED SMART USER INTERFACE SOFTWARE
Learn more at audiocontrol.com
ConclusionThe AudioControl LC-4.800
is a solidly built and well engineered product. It’s an ideal choice if you are looking to upgrade your OEM system, or as the beginnings of a full blown aftermarket system. Thanks to the added flexibility provided by the additional summable high-level inputs, the GTO signal sensing, and the AccuBASS processing, this is an amp that solves virtually all the installation issues. And just to top it off, with the MILC indicators, the always critical gain adjust-ment becomes simple and straightforward. It looks good and sounds good, because, well, it is good!
LC-4.800Amplifier Test Report
PAS_2016_JuneJuly_137_TR_AudioControl_LC-4.800_REPRINT_v2.indd 1-2 2016-06-01 11:08 AM
