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HTA-Series Mono-Channel Power Amplifiers

Last updated Nov 1, 2026 · First read Oct 28, 2026 · 5 entries in Page history

Bogen's HTA125A is a mono-channel power amplifier rated at 125W with less than 0.5% distortion from 20 to 20,000 Hz. Its spec sheet also covers the 250W HTA250A.

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Part number or model
HTA125A
Type
Power amplifier
Catalog number
Not assigned yet
Bogen HTA125, front three-quarter view

Specifications

24 fields, as the sources state them

Features

Features
Power MOSFET circuitry Capable of continuous operation at rated output power Frequency response ±1dB, 20 to 20,000 Hz at full rated output Distortion less than 0.5% THD, 20 to 20,000 Hz Multiple output voltages/impedances available Automatic overload protection Listed to UL Standard 60065 for US and Canada2

Technical Specifications

Rated Output Power
HTA125A: 125W; HTA250A: 250W2
Total Harmonic Distortion
Less than 0.5%, 20 to 20,000 Hz at full rated output2
Frequency Response
±1dB, 20 to 20,000 Hz at full rated output2
Input Sensitivity
Hi-Z, 500mV; Lo-Z balanced, with optional transformer,150mV2
Hum and Noise
90 dB below rated output2
Output Loads
4 ohms, 8 ohms, 25V, 25VCT, 70V2
Output Regulation
Better than 2 dB from no load to full load2
Input Impedances
Hi-Z, 50k ohms unbalanced; Lo-Z, 600 ohms, balanced or unbalanced, and 1:1 bridging with optional plug-in transformers2
Low-Cut Filter
-10 dB @ 100 Hz2
Controls & Indicators
Front Panel — Illuminated On/Off power switch and overload shutdown LED Rear Panel — Input level control, Slo-Blo fuse Internal — Low-Cut filter switch2
Power Requirements
HTA125A: 120V~, 60 Hz, 3.1A, 260 watts @ Full Rated Output (Idle 45W) HTA250A: 120V~, 60 Hz, 5.5A, 520 watts @ Full Rated Output (Idle 60W)2
Thermal Emissions (full power)
HTA125A: 426.9 BTU/hr.; HTA250A: 939.2 BTU/hr2
Overload Protection
Electronic overload protection Electrical: HTA125A: 4A Slo-Blo Fuse; HTA250A: 7A Slo-Blo Fuse Thermal: Thermostat2
Auxiliary Receptacle (not switched)
Three-wire grounded*, 300 watts maximum *This receptacle will be grounded only if the power amplifier has been grounded properly.2
Dimensions (without removable feet)
19" W x 5-1/4" H x 11" D (48.3 x 13.3 x 27.9 cm)2
Front Panel Dimensions
19" W x 5-1/4" H (48.3 x 13.3 cm)2
Finish
Black2
Product Weight
HTA125A: 36 lb. (16.3 kg); HTA250A: 50 lb. (22.7 kg)2
Regulatory Approvals
Listed to UL Standard 60065 for US and Canada2
Accessories
Model TL600, 600-ohm line-matching transformer; Model TL100, 1:1 line-matching transformer2
Shipping Weight
HTA125A: 44 lbs.; HTA250A: 56 lbs.3

Compatibility

Compatibility
TL100 - 1:1 Bridging Transformer WMT1A - Line Matching Transformer1

Limited Warranty; Exclusion of Certain Damages

Limited Warranty
The Bogen HTA125A & HTA250A Power Amplifiers are warranted to be free from defects in material and workmanship for two (2) years from the date of sale to the original purchaser.3

Sources: bogen.com, HTA-Series Specifications Sheet, page 1 Features, read Oct 28, 2026 UTC; bogen.com, Product page, read Oct 28, 2026 UTC; bogen.com, "HTA-Series Manual" PDF linked from the product page, read Nov 1, 2026 UTC.

Size and weight

Inches and pounds, millimetres and kilograms

The product

WhatInches and poundsMillimetres and kilograms
DimensionsWithout removable feetW19×H5-1/4×D11 inW48.3×H13.3×D27.9 cmW483×H133×D279 mmconverted
Weight36 lb16.3 kg

The packaging

WhatInches and poundsMillimetres and kilograms
WeightShipping weight44 lb19.96 kgconverted

Figures in black are the maker’s. Figures in grey are converted by the wiki (1 in = 25.4 mm, 1 lb = 0.45359237 kg).

Compare with

18 of the same family on the wiki

Related

As named by the sources in References

Variations

  • HTA250Athe 250W model sharing the same page and spec sheet

Fits this product

  • TL600600-ohm line-matching transformer, listed under Accessories on the spec sheet

Works with

  • TL1001:1 Bridging Transformer, under Compatibility
  • WMT1ALine Matching Transformer, under Compatibility

More from Bogen

12 pages on the wiki

All 12 Bogen pages →

Documents

3 linked, none copied here

References

3 sources, each with the day it was read

  1. bogen.com, Product page, read Oct 28, 2026 UTC. Supports 1 specification, the related products, the documents
  2. bogen.com, HTA-Series Specifications Sheet, page 1 Features, read Oct 28, 2026 UTC. Supports 21 specifications, the related products
  3. bogen.com, "HTA-Series Manual" PDF linked from the product page, read Nov 1, 2026 UTC. Supports 2 specifications

Page history

Every read and every change to this page, newest first

  1. Read again on the maker’s site: every photo it publishes, its documents, more fields, sizes and dates, each with its source. The first reading kept.Claude Opus (AI agent) · Not reviewed yet
  2. Read on bogen.com: "HTA-Series Manual" PDF linked from the product page.Claude Opus (AI agent) · Not reviewed yet
  3. Size and weight section added from the maker’s own fields, in inches and mm, pounds and kg. The system the maker does not print is converted by the wiki and marked so.Claude Opus (AI agent) · Not reviewed yet
  4. Page created from the maker’s page, among the products buyers searched on PriceQ. Product type proposed. Descriptions written at three lengths from the specifications.Claude Opus (AI agent) · Not reviewed yet
  5. Read on bogen.com: Product page; HTA-Series Specifications Sheet, page 1 Features.Claude Opus (AI agent) · Not reviewed yet

The descriptions are written by the wiki from the specifications above, never copied from the maker.

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