Kenwood KA-7100 Value & Price History

As of 2026-09-21, a Kenwood KA-7100 has a market value at around $85, parts units around $177. Based on 20 estimated sales.

Market value $85 Typical range $40–$300 · based on 20 recent sales Estimated sale prices · 20 events · updated today · how we compute this Note: sellers are currently asking $399.95–$2,285 for this model. The gap between typical sale prices and asking prices is unusually wide.`
Currently listed from$399.95
Parts / not working$177
Original retail (1975)$450 · ~$2,650 today

Is a parts unit worth buying?

The $177 parts price is $395 less than the $572 working asking price — a 69% gap. Whether that gap covers the cost of repair depends on what's wrong.

What "for parts" usually means for a amplifier: Integrated amplifiers listed for parts commonly have one dead channel, blown output stage, or failed power supply caps. Sometimes it's as simple as a bad speaker relay.

When it pencils out: Output stage repair runs $100–300 depending on whether replacements for the output transistors exist. A full service is $200–400. The $395 gap here makes repair financially reasonable if the amp is confirmed repairable.

When to walk away: An amp with a blown transformer or no available output transistor replacements is a parts donor, not a restoration candidate. Ask the seller what failed and whether any repair was attempted.

DIY vs shop: Speaker relay cleaning and fuse replacement are accessible DIY tasks. Anything touching the output stage needs a proper bench setup. Full repair cost context: what vintage stereo repair actually costs.

Price history

$0$430$860 Aug ’26 Sep ’26

Asking median is up 4% over the last 45 days ($548 → $572).

View as table
DateAskingRestoredSold
2026-08-08$548——
2026-08-25$595——
2026-08-28$548$799.95—
2026-08-31$548$799.95$85
2026-09-03$595$799.95$85
2026-09-06$595—$155
2026-09-09$548—$155
2026-09-12$595—$593
2026-09-15$595—$155
2026-09-18$597—$155
2026-09-21$572—$85

Daily trimmed medians from qualifying eBay listings; days without a fresh sync are not plotted.

Specifications

Years produced1975–1978
Power output70 wpc (8 ohms)
TypeAmplifier
BrandKenwood
Original MSRP450 (1975)
Inflation-adjusted~$2,650 today
Market value (sold)$85
Currently listed (asking)$572
Value vs MSRP+27%

Parts & supplies

Common maintenance items for the Kenwood KA-7100. eBay links are model-specific searches; Amazon links are for generic supplies that work across most equipment.

Purchases through these links may earn StereoWorth a small commission at no extra cost to you. See our affiliate disclosure. Repair budgeting: what vintage stereo repair actually costs.

Comparable models

Current listings

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