Jeff Rowland 201 Mono Power Amplifier (Pair), these units are in great cosmetic shape and function as they should.

Features: 

XLR input connector for balanced system configurations. Same gain and input impedance characteristics are ensured whether XLR or RCA adapted inputs are used. 

Transformer coupled input provides universal compatibility with other components and eliminates ground loop noise and EMI. 

High efficiency ICEpower® power conversion technology generates high output power with very little heat, promotes long component life and permits a relatively small physical size. 

Multistage AC line filtering in power supply reduces AC line noise pollution throughout amplifier signal circuitry. 

CE approved speaker output terminals require no tools for secure, low resistance connections. 

Fully-balanced topology implemented in both input and output circuitry. 

Proprietary switch-mode power supply technology ensures consistent performance under all operating and AC line conditions. 

Low power consumption permits constant power-up operation to eliminate warm-up time. 

Selectable overall gain of 26 or 32 dB. 

Ultra-low resonance, structurally rigid chassis, precision-machined from a solid block of aircraft grade 6061-T6 aluminum. 

Remote ON/OFF input jack allows amplifier standby operation from a remote source for inclusion into home theater (A/V) systems. 

Specifications: 
Output Power Continuous RMS 
@ 8 ohms – 250 watts 
@ 4 ohms – 500 watts 

Frequency Response 
5 Hz – 70kHz, 3dB 

Peak Output Current 
> 35 amps 

Dynamic Range 
117 dba 
Load Impedance Range 
2 ohms – 16 ohms 

THD + Noise 
0.1W-500W/4 ohm 
<.05%, typically .006 @ 1kHz 

CCIF Intermod. Dist., 
19/20kHz <.002% 

Damping Factor 
@ 1 kHz 1000 

Overall Gain 
Selectable Internal Jumper, 
26 or 32 dB 

Input Impedance 
40k Ohms 

Common Mode Rejection Ratio 
>90dB, 20 Hz 20 kHz 

Absolute Phase 
Non-inverting, Pin 2 Positive 

Inputs 
1 x Balanced XLR (Unbalanced operation requires an optional XLR to RCA adapter) 

Outputs 
1 Pair CE-Approved Binding Posts 

Power Consumption 
Idle –9 watts 
Maximum – 650 watts 

Amplifier Weight 
13 lbs/6 kg. 

Amplifier Dimensions 
2.6″ x 8.4″ x 11.5″