# Amerisleep AS6 Black (Luxury Firm) vs ThermoBalance LX (Medium): Firmness, Price, and Construction Compared

Canonical: https://squishmat.com/compare/amerisleep-as6-black-luxury-firm-vs-brooklyn-bedding-thermobalance-lx-medium · Data refreshed 2026-09-04 · Source: SquishMat

The ThermoBalance LX (Medium) is $117 cheaper in a queen; the table below shows what the price gap buys.

## Full spec table

| Spec | Amerisleep AS6 Black (Luxury Firm) | ThermoBalance LX (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 / 5.6 / 2.5 / 1.8 / 1.6 |
| Coil gauge | — | 14.5 |
| Coil count (queen) | — | — |
| Cooling | 6/10 | 6/10 |
| Motion isolation | 6/10 | 6/10 |
| Edge support | 7/10 | 7/10 |
| Pressure relief | 9/10 | 8/10 |
| Support | 8/10 | 8/10 |
| 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 | Talalay latex + memory foam hybrid, Aerated latex cooling layer, Zoned pocketed coil core, Medium responsive feel |
| Spec source | NapLab | NapLab |

## Key differences

- The ThermoBalance LX (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 each mattress is for

**Amerisleep AS6 Black (Luxury Firm):** 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. Strengths: Excellent pressure relief at the shoulders and hips; Strong, even support that keeps the spine aligned.

**ThermoBalance LX (Medium):** The ThermoBalance LX (Medium) has a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions. Strengths: Excellent pressure relief at the shoulders and hips; Strong, even support that keeps the spine aligned.

## FAQ

### Which is firmer, the Amerisleep AS6 Black (Luxury Firm) or the ThermoBalance LX (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 LX (Medium)?

The ThermoBalance LX (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 LX (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.

## More

- [Amerisleep AS6 Black (Luxury Firm) — full specs](https://squishmat.com/mattresses/amerisleep-as6-black-luxury-firm)
- [ThermoBalance LX (Medium) — full specs](https://squishmat.com/mattresses/brooklyn-bedding-thermobalance-lx-medium)
- [Comparison matrix: every mattress we track](https://squishmat.com/compare)

Free to cite with attribution — link to the canonical page. Where a datapoint traces to a third-party teardown, please credit the original measurer too (sources are cited per bed on https://squishmat.com/mattress-database).