TEAC HA‑507 Pure Analog Headphone Amplifier/Preamplifier - Silver
The HA‑507 is TEAC’s reference‑grade pure analog headphone amplifier and preamplifier. Its fully balanced, dual‑mono Class AB design employs four amplifier elements originally developed for driving speakers, delivering exceptional power and wide bandwidth while preserving the purity of your music. With a no‑compromise analog signal path and TEAC’s premium materials, the HA‑507 can act as the heart of a dedicated headphone system or serve as an analog preamp when paired with a power amplifier.
Beyond its muscular power stage, the HA‑507 features TEAC‑QVCS Advanced volume control—a precision quad‑channel ladder resistor network that offers 0.25 dB steps and uncompromised channel separation. Two balanced XLR and two RCA inputs feed a lossless FET switching section and TEAC‑HCLD 2 high‑current line driver, while dual independent power supplies and a semi‑floating aluminum chassis ensure ultra‑low noise and superb dynamics. Balanced and unbalanced headphone outputs, selectable gain, preamp pass‑through and a remote‑controlled motorized volume knob make this amplifier/preamplifier as versatile as it is refined.
TEAC HA‑507 Silver Key Features
- High‑power Class AB amplifier with fully balanced/dual‑mono topology and four amplifier elements designed for speaker drive, delivering 6,700 mW per channel into 32 Ω for exceptional headphone performance.
- Versatile connectivity with balanced XLR 4‑pin and 4.4 mm Pentaconn outputs plus unbalanced 6.3 mm and 3.5 mm outputs, switchable high/mid/low gain and a preamp pass‑through mode for use as a dedicated headphone power amp.
- TEAC‑QVCS Advanced volume control uses a quad‑channel ladder resistor network to provide smooth 0.25 dB increments, superior channel separation and extremely low noise.
- TEAC‑HCLD 2 high‑current line driver and lossless FET input switching (two balanced XLR and two RCA inputs) preserve signal purity and offer robust drive capability for external amplifiers via balanced and unbalanced preamp outputs.
- Dual independent power supplies with large toroidal transformers and 18,800 µF per channel dual‑mono capacitors provide dynamic, responsive power, while discrete regulation circuits enhance dynamics and imaging.
- Premium mechanical design with a compact A4‑sized aluminum chassis, semi‑floating 2.8 mm top plate, Stressless metal feet, fanless heat dissipation and high‑grade motorized volume knob with remote control; available in silver or black finishes.
TEAC HA‑507 Silver Specifications
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Balanced headphone output: 6,700 mW + 6,700 mW (32 Ω), 4,200 mW + 4,200 mW (100 Ω), 1,800 mW + 1,800 mW (300 Ω), 950 mW + 950 mW (600 Ω); gain settings: high, mid, low; supported load impedance 16–600 Ω.
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Frequency response and noise: 10 Hz – 150 kHz (±1/–4 dB); THD + N 0.0006 % (1 kHz, LPF 20 kHz); signal‑to‑noise ratio 110 dB (A‑weighted, 1 kHz).
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Inputs and preamp outputs: Balanced XLR × 2 (40 kΩ, 6 V RMS max) and RCA × 2 (20 kΩ, 3 V RMS max); preamp outputs balanced XLR × 1 (50 Ω, 7 V RMS max) and RCA × 1 (100 Ω, 3.5 V RMS max).
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Headphone connectors: Balanced 4‑pin XLR × 1 and 4.4 mm Pentaconn × 1; unbalanced 6.3 mm stereo jack × 1 and 3.5 mm mini jack × 1.
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Power and consumption: Dual independent power supplies for audio and control circuits; AC 100 V 50/60 Hz; consumption 30 W (0.3 W standby); large toroidal transformers and 18,800 µF per channel capacitance.
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Dimensions & weight: 290 × 84.5 × 243.9 mm (11.5 × 3.38 × 9.6 inches) including protrusions; weight 4.6 kg (10.25 lb); includes power cord, RC‑1340 remote, AAA batteries × 2, feet cushions × 3 and owner’s manual.
TEAC HA‑507 Silver FAQs
- What makes the HA‑507 a “pure analog” amplifier?
- The HA‑507 maintains an analog signal path from input to output with fully balanced dual‑mono Class AB amplifiers and discrete circuitry, avoiding any digital processing for uncompromised sonic purity.
- Can I use both balanced and unbalanced headphones?
- Yes. The amplifier includes balanced XLR 4‑pin and 4.4 mm Pentaconn outputs as well as unbalanced 6.3 mm and 3.5 mm jacks, plus selectable gain settings to optimize performance for a wide range of headphones.
- Does the unit function as a preamplifier?
- Absolutely. It offers balanced and unbalanced preamp outputs, TEAC‑QVCS Advanced volume control and lossless FET switching so you can integrate it into a speaker system or activate preamp pass‑through when using it solely as a headphone power amp.
- How does TEAC‑QVCS Advanced improve volume control?
- This quad‑channel ladder resistor network isolates left/right and positive/negative signals, providing 0.25 dB steps for precise adjustments and superior channel separation, resulting in cleaner stereo imaging and lower noise.
- What measures are used to reduce noise and distortion?
- Dual independent power supplies, large toroidal transformers, high‑capacity capacitors and discrete regulated circuits ensure a stable, low‑noise power source. Balanced topology and FET switching further minimize distortion, yielding a THD+N of 0.0006 % and an S/N ratio of 110 dB.
- What are the physical dimensions and finish options?
- The compact HA‑507 measures 290 × 84.5 × 243.9 mm and weighs 4.6 kg. It is housed in an aluminum chassis with a semi‑floating top panel, Stressless feet and high‑grade knobs, and it is available in silver or black finishes.
