Kenwood KA-8100 Value & Price History
As of 2026-09-21, a Kenwood KA-8100 has a market value at around $27, parts units around $509.87. Based on 41 estimated sales.
Is a parts unit worth buying?
The $509.87 parts price is $90.13 less than the $600 working asking price — a 15% 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 $90.13 gap here is tight — only pursue if you have a specific diagnosis and repair quote in hand.
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
Asking median is down 25% over the last 45 days ($799.99 → $600).
View as table
| Date | Asking | Restored | Sold |
|---|---|---|---|
| 2026-08-08 | $799.99 | — | — |
| 2026-08-25 | $600 | $600 | — |
| 2026-08-28 | $600 | — | — |
| 2026-08-31 | $600 | — | $25 |
| 2026-09-03 | $600 | — | $25 |
| 2026-09-06 | $600 | — | $25 |
| 2026-09-09 | $700 | — | $25 |
| 2026-09-12 | $600 | — | $25 |
| 2026-09-15 | $600 | — | $27 |
| 2026-09-18 | $600 | — | $29 |
| 2026-09-21 | $600 | — | $27 |
Daily trimmed medians from qualifying eBay listings; days without a fresh sync are not plotted.
Specifications
| Years produced | 1977–1979 |
| Power output | 80 wpc (8 ohms) |
| Type | Amplifier |
| Brand | Kenwood |
| Original MSRP | 500 (1977) |
| Inflation-adjusted | ~$2,550 today |
| Market value (sold) | $27 |
| Currently listed (asking) | $600 |
| Value vs MSRP | +20% |
Parts & supplies
Common maintenance items for the Kenwood KA-8100. eBay links are model-specific searches; Amazon links are for generic supplies that work across most equipment.
- Kenwood KA-8100 capacitor recap kit on eBay →
- Kenwood KA-8100 replacement knobs on eBay →
- Fuses for the Kenwood KA-8100 on eBay →
- DeoxIT D5 — cleans oxidized contacts, quiets scratchy pots on Amazon →
- Multimeter — check DC offset before connecting speakers on Amazon →
- Speaker wire on Amazon →
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
- Kenwood KA-7300 $385
- Kenwood KA-8004 $20
- Kenwood KA-7100 $85
Current listings
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