Keiga Powered Subwoofer Amplifiers

Powered Subwoofer Amplifiers
& 2.1 Media Amplifier

Madisound is pleased to offer Keiga Subwoofer Amplifiers with Electronic Crossovers for powered subwoofer systems. We have worked hard to find subwoofer amplifiers that have adjustable electronic crossovers and have enough power to deliver good bass without added distortion. We are confident that these are products that can meet the demands of both home theater or high end audio systems. Powered subwoofers are a versatile addition to your audio system. With the variable crossover and volume control, you can match a subwoofer to any existing system. These amplifiers can be used with single or multiple woofer systems (a total impedance of 4 to 8 ohms is recommended). The crossover can be bypassed if you are using the amplifier with a system that already has a built in crossover.

KG-3100 $142.00
The KG-3100 2.1 Amplifier was developed for small sub/sat systems. The amp is designed to be built into the subwoofer enclosure and then out to the satellite speakers. You can use the built in electronic crossover to divide the frequencies between the amp and the satellites. The electronic crossover is continuously variable from 75Hz to 150Hz. There is a master volume control and a volume control for just the subwoofer. The amplifier will accept either RCA inputs or 3.5mm Mini Jack inputs. If you are using the mini jack inputs, you can purchase a separate desktop volume control for use with your computer. The KG-3100 is the perfect choice to build a system for your computer, MP3 player, portable CD player, office or small apartment.

• X-over LP + HP: 75Hz - 150Hz
• Rear plastic cover
• Master & woofer volume controls
• Switchable bass boost 3dB@40Hz
• Auto on control
• Gold Plated Binding Posts for Satellite Outs
• Separate KG-VC desktop mini jack volume control for $15.85.

KG-VC $15.85
Desktop Mini Jack Volume Control

KG-5150 $169.00

KG-5230 $225.00

Features

Discrete high current drivers and output devices
LED power indicator
Woofer volume control
50Hz to 100Hz continuously adjustable low pass 12dB electronic crossover
Crossover on/off switch
(Only KG-5230)
Low and High level input, summed to mono signal
Low and High level all pass output
Phase inverter switch
Master power switch
Auto power on/off activated by input signal
4dB boost @ 25Hz, 15 Hz High pass
KG-5150 available in either 110V or 230V
KG-5230 is 110V/230V switchable

Woofer Suggestions (Including 4dB boost)
Item	Size	Ft³	S/V	3”Ø	F3	W
Madisound 1252DVC	12”	3.5	S	-	25.7	75
Madisound Swan 305	12”	4.25	V	5.5”	23.5	200
Eclipse W1238R	12”	3	V	8.75”	28.7	200
Peerless 850410	10”	1.25	V	7”	34.5	200
Peerless 831727	10”	2.25	V	10”	26.7	220
Peerless 850146	10”	3.1	V	8.1”	23.8	220
Peerless 831857	12”	6	V	7”	23	220
Peerless 831857	12”	3	S	-	28	220
Scan-speak 25W/8565	10”	3	S	-	26.7	100
Scan-speak 25W/8565-01	10”	3	V	10”	25.7	100
NHT 1259	12”	3.5	S	-	23.8	300
Vifa M26WR09-08	10”	1.7	V	7.6”	33.4	130
Dynaudio 30W100	12”	5.5	S	-	24.7	130
Dynaudio 30W100XL-4	12”	4.5	S	-	25.7	130
Eton 12-680/62 Hex	12”	2.4	V	7”	27.7	200
Audax HT300Z2	12”	3.1	V	7.75”	28	150

Specifications	KG-5150	KG-5230	KG-3100
Power output Watt@ 4 ohms	200	300	50 & 2x25
THD	0.05%	0.08%	0.08%
S/N ratio @ rated power	85dB	85dB	76 dB
Input sensitivity @ 100Hz - low level	75mV	75mV	80mV
Input sensitivity @ 100Hz - high level	3.5V	3.5V	3.5V
Input impedance	22k ohms	22k ohms	22k ohms
Variable Low Pass Crossover Freq.	50-100Hz	50-100Hz	75-150 Hz
Weight	10.5 lbs	14.5 lbs	7.6 lbs
Dimensions W x H inches	11^7/16 x 8 ^1/4	9 ^7/8 x 9 ^7/8	8 ^11/16 x 7 ^7/8
Cutout hole W x H inches	10 ^7/16 x 7 ^1/4	8 ^7/8 x 8 ^7/8	7 ^11/16 x 6 ^7/8
AC Voltage	115	115 / 230 switchable	115 / 230 switchable
Price Each	$169.00	$225.00	$136.00