Head to head
Polk ES20 vs Polk Reserve R700
A budget bookshelf against a three-way tower for the front left and right. The deciding factor is room size and whether a subwoofer carries the bass.
Updated September 12, 2026
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This is the bookshelf-or-tower question for the front pair, using two Polk speakers that measured well at very different prices. Both have 88 dB sensitivity and a Polk house sound. The one question that decides it: is the room small enough, and the subwoofer good enough, that a bookshelf can do the job?
| Spec | ||
|---|---|---|
| Best for | Surrounds or a small-room stereo pair on a budget | Front left/right in medium to large rooms |
| Price tier | Budget | Mid-range |
| Type | 2-way bookshelf | 3-way tower |
| Drivers | 6.5-inch woofer, 1-inch Terylene dome | Dual 8-inch woofers, 6.5-inch mid, 1-inch ring radiator |
| Sensitivity | 88 dB (measured, ASR) | 88 dB |
| Bass extension | About 35 Hz in-room (ASR) | 38 Hz at -3 dB, ported |
| Impedance | Not published | 8 ohm nominal |
| Matching center in catalog | None in Signature Elite line | Reserve R400 |
| Sold as | Pair | Each |
Pick the Polk Audio Signature if
- Your room is small and the speakers will cross over to a subwoofer at 80 Hz.
- You want a budget front pair now and plan to move them to surround duty later.
- You have limited floor space or need speakers on a shelf or stands.
Pick the Polk Audio Reserve if
- Your room is medium to large and you want the fronts to play full range for music.
- You want a timbre-matched center, and the Reserve R400 is in the same family.
- You want higher output at movie levels without strain.
Verdict
Buy the Reserve R700 pair for a medium or large room where the front stage carries most of the sound and a matching center matters. Buy the ES20 pair for a small room with a capable subwoofer, or as the surrounds behind a Reserve front three. The exception is a music-first small room with no sub, where the ES20 still needs help below 40 Hz and the R700 does not.
Common questions
- Can I mix ES20 surrounds with R700 fronts?
- Yes. Surrounds do not need a strict timbre match, and the ES20's wide dispersion suits surround duty.
- Do the R700s need a subwoofer?
- For movies, yes; for music in a medium room, they reach about 40 Hz on their own.
- Is there a Reserve bookshelf that matches the R700?
- The Reserve R100 exists, but Erin's Audio Corner found a midrange resonance, so the ES20 remains the better budget bookshelf.