The venerable NAD 3080 would more than handle the requirements you need. This NAD amp would drive 2 ohm loads with ease and will drive planars nicely. Hard to find but worth the search.
The NAD 3080 is a fully descrete amplifier,no cheap IC parts anywhere. Appears to use the Motorola hi hat output transistors wired in parallel no less! Means they are coasting most of the time.
Power Amplifier Section:
Continous average power output at 8 ohms min RMS power per channel 20-20,000 kHz both channels driven,with no more than the rated distortion/ 90 W(19.5 dBW)
Distortion: 0.03%
Clipping Headroom: + 1.6 dB
Clipping Power(Maximum Power) 130 Watts at 8 ohms
160 Watts at 4 ohms
180 Watts at 2 ohms
Dynamic Headroom at 8 ohms - + 2.5 dB
Dynamic Power( short term) 160 Watts at 8 ohms
200 Watts at 4 ohms
200 Watts at 2 ohms
Reactive Load Rating - + 2.5 dB(160 W)
Transient Overload Recovery Time <5 uSec.
Slew Factor - >50
Slew Rate - 40V/uSec.
Damping Factor at 50Hz 8 ohms - 120
THD - <0.03
IM - <0.03
TIM - <0.03
Frequency Response 20-20,000 kHz at rated Power - +/- 0.5dB
Frequency Response Range 5-50kHz
Input Impedance -10K/100pf
Input Sensitivity - 140 mV
Signal to Noise Ratio - 104 db at rated power.
Pre Amplifier Section:
Phono Inputs(2 provided)
Input Impedance - 47k Ohm/47pf
Input Sensitivty - 0.25mV
Input Overload - 200mV
THD - 0.01%
RIAA Response Accuracy - +/- 0.3dB
Signal to Noise w/cartridge - >82dB ref 10 mV
High Level Inputs(Tuner,Aux,Tape)
Input Impedance - 50k ohm/100pf
Input Sensitivty - 20mV
Signal to Noise Ratio - >80 dB
Maximum Input Signal - Infinite
Frequency Response 20-20 kHz - Infinite
Distortion All Types - <0.01%
(THD,SMPTE IM,IHF,CCIF,TIM)
Controls:
Bass Control Range at 50Hz - +/- 11 & +/- 13dB
Treble Control Range at 10kHz +/- 6 & +/- 9 dB
Infrasonic Filter - 20Hz 12dB/oct.
High Filter - 8kHz 12db/oct
In my opinion one of the best Integrated amps ever made and could compete with the Accuphase of the time at far less cost. The problem, trying to find one, as this was one of the products that established NAD. Since the 3080 Integrated Amp which was the flagship model, NAD has not produced any integrated that is as good as this one.
The NAD 3080 is a fully descrete amplifier,no cheap IC parts anywhere. Appears to use the Motorola hi hat output transistors wired in parallel no less! Means they are coasting most of the time.
Power Amplifier Section:
Continous average power output at 8 ohms min RMS power per channel 20-20,000 kHz both channels driven,with no more than the rated distortion/ 90 W(19.5 dBW)
Distortion: 0.03%
Clipping Headroom: + 1.6 dB
Clipping Power(Maximum Power) 130 Watts at 8 ohms
160 Watts at 4 ohms
180 Watts at 2 ohms
Dynamic Headroom at 8 ohms - + 2.5 dB
Dynamic Power( short term) 160 Watts at 8 ohms
200 Watts at 4 ohms
200 Watts at 2 ohms
Reactive Load Rating - + 2.5 dB(160 W)
Transient Overload Recovery Time <5 uSec.
Slew Factor - >50
Slew Rate - 40V/uSec.
Damping Factor at 50Hz 8 ohms - 120
THD - <0.03
IM - <0.03
TIM - <0.03
Frequency Response 20-20,000 kHz at rated Power - +/- 0.5dB
Frequency Response Range 5-50kHz
Input Impedance -10K/100pf
Input Sensitivity - 140 mV
Signal to Noise Ratio - 104 db at rated power.
Pre Amplifier Section:
Phono Inputs(2 provided)
Input Impedance - 47k Ohm/47pf
Input Sensitivty - 0.25mV
Input Overload - 200mV
THD - 0.01%
RIAA Response Accuracy - +/- 0.3dB
Signal to Noise w/cartridge - >82dB ref 10 mV
High Level Inputs(Tuner,Aux,Tape)
Input Impedance - 50k ohm/100pf
Input Sensitivty - 20mV
Signal to Noise Ratio - >80 dB
Maximum Input Signal - Infinite
Frequency Response 20-20 kHz - Infinite
Distortion All Types - <0.01%
(THD,SMPTE IM,IHF,CCIF,TIM)
Controls:
Bass Control Range at 50Hz - +/- 11 & +/- 13dB
Treble Control Range at 10kHz +/- 6 & +/- 9 dB
Infrasonic Filter - 20Hz 12dB/oct.
High Filter - 8kHz 12db/oct
In my opinion one of the best Integrated amps ever made and could compete with the Accuphase of the time at far less cost. The problem, trying to find one, as this was one of the products that established NAD. Since the 3080 Integrated Amp which was the flagship model, NAD has not produced any integrated that is as good as this one.