We have a range of Direct Servo enabled amplifiers. These feature a servo board which has been designed specifically for the driver which will be used.
4 different versions- Standard PEQ3 amplifiers: for those who use bass management in their HT receivers
- PEQ amplifiers: includes one band of defeatable parametric EQ
- XLR2 amplifiers: balanced inputs and master control - multiple subs controlled from the settings on the master sub
- XLR3 amplifiers: two XLR inputs for dual two channel and HT usage
Our A series amplifiers are class AB, and H series use class H. All amplifiers use toroidal transformers except A300 which use EI transformer. We no longer supply nonservo amplifiers as we are now exclusively servo subwoofer manufacturer. The information here is to provide an overview of the servo amplifiers used in our products.
All of our amplifiers have the same cut out dimensions so that they are interchangeable. The Servo version of these amplifiers are used in all of our finished subwoofers and custom installation kits. Here we list them for side-by-side comparison.
| Servo Model | A370PEQ | A370-PEQ3 | A370-XLR2 | A370-XLR3 |
| Output Power | 370W RMS | 370W RMS | 370W RMS | 370W RMS |
| Input Type | Speaker/RCA | Speaker/RCA | RCA/XLR | RCA/XLR |
| Master control | NO | NO | YES | NO |
| High Pass Filter Output | two RCAs | NO | One XLR only | NO |
| LFE inputs | use Line-in | RCA | RCA only | RCA/XLR |
| Parametric EQ | Defeatable one-band | Defeatable one-band | Defeatable one-band | Defeatable one-band |
| Power amp inputs | MOSFETs | MOSFETs | MOSFETs | MOSFETs |
| 12V Trigger input | NO | NO | YES | YES |
| Power filter caps | 4x100V/6800uF | 4x100V/6800uF | 4x100V/6800uF | 4x100V/6800uF |
| Warranty | 2yr | 2yr | 2yr | 2yr |
| Control Layout |  |
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Click images to view full size
Download quick guides | A370PEQ | A370PEQ3 | A370XLR2 | A370XLR3
High powered H Series
| Servo Model | H600PEQ3 | H600XLR2 | H600XLR3 |
| Output Power (4ohms) | 600W RMS | 600W RMS | 600W RMS |
| Input Type | Speaker/RCA | RCA/XLR | RCA/XLR |
| Master control | NO | YES | NO |
| High Pass Filter Output | NO | 1 XLR | NO |
| LFE inputs | RCA | RCA only | RCA/XLR |
| Parametric EQ | Defeatable one-band | Defeatable one-band | Defeatable one-band |
| Power amp inputs | MOSFETs | MOSFETs | MOSFETs |
| 12V Trigger input | NO | YES | YES |
| Power filter caps | 4x63V/18000uF | 4x63V/18000uF | 4x63V/18000uF |
| Warranty | 2yr | 2yr | 2yr |
| Control Layout | |
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Download quick guides H600PEQ3 | H600XLR2 | H600XLR3
HX Series (Hypex module based)
| Servo Model | HX800XLR3 |
| Output Power (4ohms) | 800W RMS (400WRMS x2) |
| Input Type | RCA/XLR |
| Master control | NO |
| High Pass Filter Output | NO |
| LFE inputs | RCA/XLR |
| Parametric EQ | Defeatable one-band |
| 12V Trigger input | YES |
| Power filter caps | 4x80V/8200uF |
| Warranty | 2yr |
| Control Layout | |
Download quick guides | HX800XLR3
Crossover note on all models
For those who really need it for a non-HT setup, PEQ and XLR amplifiers have a 12db-24db/oct selectable low pass filter to use with or without an HT receiver. That switch is located with the other controls. The 24db/oct on them is implemented as 12db/oct adjustable via a knob plus a 12db/oct fixed at either 50hz or 80hz (two switch positions).
For international shipping, please check out order page. Currently these amplifiers are configured as servo only.
View Rythmik Audio Direct Servo enabled versions >
View GR Research DIrect Servo versions >