Amerisleep AS6 Black (Luxury Firm) vs ThermoBalance (Medium)
The ThermoBalance (Medium) is $117 cheaper in a queen; the table below shows what the price gap buys. Every number below comes from published teardowns and spec sheets (see our methodology); prices are queen-size, refreshed 2026-09-04.
Amerisleep AS6 Black (Luxury Firm) vs ThermoBalance (Medium): full spec table
| Spec | Amerisleep AS6 Black (Luxury Firm) | ThermoBalance (Medium) |
|---|---|---|
| Type | Hybrid | Hybrid |
| Firmness | 6/10 | 6/10 |
| Height | 13.5" | 14" |
| Queen price | $2,649 | $2,532 |
| Price range (all sizes) | $2,399–$2,899 | $1,832–$3,199 |
| Foam densities (lb/ft³, top → bottom) | 4.0 / 4.0 / 1.5 / 1.5 / 1.5 | 1.5 / 2.3 / 3.9 / 1.6 / 1.6 |
| Coil gauge | — | 13.5 |
| Coil count (queen) | — | — |
| Cooling | 6/10 | 6/10 |
| Motion isolation | 6/10 | 6/10 |
| Edge support | 7/10 | 8/10 |
| Pressure relief | 9/10 | 9/10 |
| Support | 8/10 | 9/10 |
| Natural materials | 3/10 | 4/10 |
| Notable features | Flagship luxury hybrid, Dual high-density memory foam comfort layers, Cooling cover with zoned coil core, Medium-firm balanced feel | Cooling-focused hybrid, High-density 3.9 PCF memory foam, Zoned 13.5-gauge coils, Medium-firm feel |
| Spec source | NapLab | NapLab |
Key differences
- The ThermoBalance (Medium) is $117 cheaper in a queen ($2,532 vs $2,649 as of 2026-09-04) than the Amerisleep AS6 Black (Luxury Firm).
Who the Amerisleep AS6 Black (Luxury Firm) is for
The Amerisleep AS6 Black (Luxury Firm) has a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions.
- Excellent pressure relief at the shoulders and hips
- Strong, even support that keeps the spine aligned
Who the ThermoBalance (Medium) is for
The ThermoBalance (Medium) has a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions.
- Excellent pressure relief at the shoulders and hips
- Strong, even support that keeps the spine aligned
- Sturdy edges that make the full surface usable
SquishMat may earn a commission if you buy through links on this page, at no extra cost to you. Commissions never influence which mattresses we recommend. How we make money
Frequently asked questions
Which is firmer, the Amerisleep AS6 Black (Luxury Firm) or the ThermoBalance (Medium)?
They rate the same: both are a 6/10 on the firmness scale, a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions.
Which is cheaper, the Amerisleep AS6 Black (Luxury Firm) or the ThermoBalance (Medium)?
The ThermoBalance (Medium) is cheaper in a queen: $2,532 versus $2,649, as of 2026-09-04.
What is the main construction difference between the Amerisleep AS6 Black (Luxury Firm) and the ThermoBalance (Medium)?
Both are hybrid builds with similar published specs — the differences come down to feel and price rather than construction. The full layer-by-layer comparison is in the table above.
See how both stack up against every bed we track in the full comparison matrix, or dig into the complete specs for the Amerisleep AS6 Black (Luxury Firm) and the ThermoBalance (Medium).