Boston Acoustics A40 Value & Price History
As of 2026-09-21, a Boston Acoustics A40 has a market value at around $28 (per pair). Based on 344 estimated sales.
Market value (per pair)
$28
Typical range $10–$55 · based on 344 recent sales
Estimated sale prices · 344 events · updated today · how we compute this
Note: sellers are currently asking $119.95–$200 for this model. The gap between typical sale prices and asking prices is unusually wide.`
Currently listed from$119.95
Original retail (1985)$300 · ~$900 today
Price history
View as table
| Date | Asking | Restored | Sold |
|---|---|---|---|
| 2026-08-25 | $129 | — | — |
| 2026-08-28 | $129 | — | — |
| 2026-08-31 | $129 | — | $27 |
| 2026-09-03 | $129 | — | $27 |
| 2026-09-06 | $129 | — | $27 |
| 2026-09-09 | $129 | — | $27 |
| 2026-09-12 | $159.99 | — | $27 |
| 2026-09-15 | $140 | — | $28 |
| 2026-09-18 | $159.99 | — | $28 |
| 2026-09-21 | $159.99 | — | $28 |
Daily trimmed medians from qualifying eBay listings; days without a fresh sync are not plotted.
Specifications
| Years produced | 1985–1991 |
| Type | Speaker |
| Brand | Boston Acoustics |
| Original MSRP | 300 (1985) |
| Inflation-adjusted | ~$900 today |
| Market value (sold) | $28 |
| Currently listed (asking) | $159.99 |
| Value vs MSRP | -47% |
Parts & supplies
Common maintenance items for the Boston Acoustics A40. eBay links are model-specific searches; Amazon links are for generic supplies that work across most equipment.
- Boston Acoustics A40 surround refoam kit on eBay →
- Boston Acoustics A40 crossover rebuild caps on eBay →
- Boston Acoustics A40 replacement tweeter on eBay →
- Boston Acoustics A40 grilles and badges on eBay →
- Speaker wire — 16awg is standard for most setups on Amazon →
- Banana plugs — cleaner connection than bare wire on Amazon →
- Polyfill acoustic stuffing — reduces internal resonance in sealed and ported cabinets 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
- Boston Acoustics A200 $29/pair
- Acoustic Research AR-2ax $399/pair
- Klipsch KG3 $250/pair
Current listings
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