The Hafler DH-101 is the control center of your high fidelity system.
Its extremely low distortion and noise level provides very accurate control of the following functions:
Preamplification and equalization for such sources as tape recorders, tuners, and the like;
Control of tonal balance of all signals;
Adjustment of volume level and balance;
Switching facilities for all signal sources;
Tape copying facilities and monitoring capability while tape recording.
Special features:
Lowest distortion from phono input to preamp output
Extraordinary pulse and square wave response
Widest power bandwidth
Highest phono input acceptance level - 1,8 volts at 20 kzh
High slew rate both phono section and tone control stage
Fast rise time
Human engineered with self-indicating push buttons
All discrete transistors, no ICs in audio circuits
Tape dubbing facilities
Provision for internal moving coil pre-preamp
Sub-sonic filter meets latest RIAA standard
Easiest kit construction
No cartridge interaction
Precision RIAA equalization all push pull design
Regulated power supply
International power transformer
Complete tape record, monitor, and duplicate facilities
Feedback tone controls with defeat switch
Prefabricated and pretested circuit modules carry all components, operating controls, and switches
Finest quality components including tantalum capacitors and film resistors where useful
Provision for patching external equipment such as a noise reduction unit or graphic equalizer
Specifications
Phono Preamp Section
Type: Discrete transistor (No integrated circuits)
Rated Output: 3 volts, 10 Hz to 100 kHz
Max. Output: 7 volts, 20 Hz to 20 kHz
Total Harmonic Distortion : less than 0,0006% at 1 kHz and 3 volts out
Slew Rate: 12 volts per microsecond
Phono Overload: 180 mV at 1 kHz ; 1,8 V at 20 kHz
Phono Cartridge Interaction at 20 kHz: Unmeasureable
Hum and Noise: 86 dB below 10 mV, 1khz input (A weighted)
Frequency Response: complies with RIAA sepcification 40 Hz to 15 kHz ±0,5 dB
Hi-pass Filter: In accordance with proposed RIAA revision
Gain: 34 dB at 1 kHz
Input impedance: 47 k Ω in paralel with 250 pf
Tone Control Section and High Level Amplifier
Type: Discrete transistor (no integrated circuits)
Rated Output: 3 volts 10 Hz to 100 kHz
Max. Output: 7 volts, 10 Hz to 100 kHz
Total Harmonic Distortion less than 0,001%, 20 Hz to 20 kHz at rated output
Slew Rate: 12 volts per microsceond
Rise Time: 2 microseconds
Hum and Noise: 90 dB below 1 volt (A weighted)
Frequency Response: 20 Hz to 20,000 Hz +0 dB, -0.25 dB
Gain: 20 dB ±1 dB
Input Impedance: better than 25 k Ω
Bass Control:
Type: Moving Inflection with variable turnover frequency
Amount: ±12 dB at 50 Hz
Treble Control:
Type: shelving with fixed turnover frequency
Amount; ±10 dB at 20 kHz
General Specifications
Semiconductors: 28 Transistors; 4 Diodes; 1 LED; 2 ICs power supply regulators
Inputs: Two phono, tuner, auxiliary; two tape recorders
Outputs: Two tape (buffered) and one profram
Provision for patching in external equipment
Controls: Volume, balance, bias, trebl, tape dubbing, input switching, mono-stereo, tone control engage, power on-off
Intermodulation Distortion: at normal levels of operation, IMD, whether SMPTE or CCIF, from phono iput to preamplifier output is below the residual of currently available instruments
AC Convenience Outlets: 2 switched; 5 amp continuous, 72 amp surge; 2 unswitched, 5 amp continuous
Power Requirements: AC 100/120/200/220/240 50/60 Hz
Power Consumption: 3,5 watts
Dimensions (W x H x D): 350 x 82,5 x 215 mm (13,75" x 3,25" x 8,5")
Weight: 3,6 kg (8 lbs )