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HA-1100
Commentary

This is a stereo pre-main amplifier developed with Lordi's technical capabilities, with the goal of creating an amplifier with comprehensive value.

The power amplifier uses an inverted Darlington pure complimentary service OCL circuit configuration with two stage constant-current drive emitters to achieve low distortion factor.
In addition, the parallel push-pull of the pair transistors with the same characteristics ensures good linearity of current characteristics, and the large capacity power supply realizes faithful transmission from small output to large output.

The equalizer stage has a 3-stage configuration with an FET differential amplifier in the first stage. It is driven by ± 2 power supply to obtain large dynamic margin and low distortion.

The tone control circuit uses the same 3-stage differential input amplifier as the equalizer circuit, and the final stage is an emitter follower with a constant current load to suppress the degradation of the SN ratio and the fluctuation of frequency characteristics depending on the tone position.
With this tone control, you can change the turnover frequency in three stages for both Bass and Treble, so that you can adjust the tone quality to your preference. In addition, you can obtain a flat frequency response with the tone defeat switch.

The volume uses a 22-contact switch type attenuator.
It is also equipped with an additive 3-stage gain selector.

Equipped with speaker B level adjustment.

The input level of Phono2 can be varied by 6 dB.

Equipped with electronic protection circuit.

Equipped with 2-stage switching type low filter and high filter.

Equipped with a mode switch and a loudness switch.

Model Rating
Type Pre-main amplifier
Power Amplifier Unit
Circuit system All two differential stages are connected to ground emitter inverted Darlington
Net complimentary service OCL
Effective power
20 Hz to 20 kHz, both channel drive : 90W + 90W (4 Ω)
80W + 80W (8 Ω)
1 kHz, both channel drive : 100W + 100W (4 Ω)
90W + 90W (8 Ω)
1 kHz, single-channel drive : 110W/110W (4 Ω)
100W/100W (8 Ω)
Dynamic Power (IHF) 220W (8 Ω)
Total harmonic distortion factor 0.1% (Effective Output)
0.006% (1 kHz at 1/2 effective output)
Intermodulation distortion factor (70 hz : 7 khz = 4 : 1) 0.03% (at effective output)
0.03% (at 1W output)
Output bandwidth 6 Hz to 50 kHz
Frequency characteristic 6 Hz ~ 60 kHz + 0 -1dB
Input Sensitivity / Impedance 1V/70k Ω
Output terminal A, B, C : 4 Ω ~ 16 Ω
A + B, A + C : 8 Ω ~ 16 Ω
Headphone terminal : 4 Ω ~ 16 Ω
Damping factor 60 or More (1 kHz, 8 Ω)
S/N (IHF, A Network) 100 dB or more
Preamplifier Section
Circuit system Equalizer amplifier : 1-stage and 3-stage differential directly connected, with FET
Control Amplifier : NF Type, First Stage FET Used
Input Sensitivity / Impedance Phono1 : 2mV/50k Ω
Phono2 : 1.6 ~ 6mV/50k Ω (continuously variable)
Tuner, Aux1, 2, Tape PB1, 2 : 100mV/50k Ω
Phono maximum allowable input Phono1 : 430 mV (RMS, 1 kHz)
Phono2 : 330 to 1300 mV (RMS, 1 kHz)
Output Level / Impedance
Tape rec1, 2 : 100mV/1k Ω
Pre out: 1V/28 Ω (Rating)
15V/28 Ω (max.)
Frequency characteristic Phono (RIAA deviation) : 30 Hz to 15 kHz ± 0.3 dB
Tone control
Bass: ± 10 dB (50 Hz, 100 Hz, 150 Hz)
Turnover frequency : 150 Hz, 300 Hz, 600 Hz
Treble: ± 10 db (6 kHz, 10 kHz, 20 kHz)
Turnover frequency : 1.5 kHz, 3 kHz, 6 kHz
Filter Low : 15Hz/30Hz, 12dB/oct.
High : 8kHz/16kHz, 6dB/oct.
Loudness control (Volume -30dB) + 13 dB (100 Hz), + 7 dB (10 kHz)
S/N (IHF, A-Network, input short) Phono:75dB
Tuner, Aux, Tape PB : 90 dB
Attenuator -5, -10, -20dB (can add)
<General>
Semiconductor used Transistor : 61
FET : 8
Diode : 32 pcs
Power supply voltage 100 VAC, 50Hz/60Hz
AC outlet Power switch interlock : 1 system
Power switch not linked : 2 systems
Rated power consumption (Electrical Appliance and Material Control Law) 200W
External dimensions Width 468x Height 188x Depth 395 mm
Weight 18kg