Temple Audio TRIO 21 Dimensions and How Many Pedals Fit
The Temple Audio TRIO 21 is 21 × 16.5 in (533 × 419 mm). It holds 18 BOSS-size pedals in 3 rows with slim couplers, or 15 with patch cables, before a power supply. Three rows of BOSS-size pedals need 16.4 in (417 mm) of depth. The board has 16.5 in (419 mm). Temple Audio publishes the size of the deck, not of the outside frame.
How many pedals fit on the Temple Audio TRIO 21
BOSS-size means a compact like the BOSS DS-1, 2.87 × 5.08 in (73 × 129 mm). Pedals stand upright, rows are 15 mm apart, and no room is kept for a power supply. How we count
| Pedal body | Size | Slim couplers (12 mm) | Patch cables (25 mm) |
|---|---|---|---|
| MiniIbanez TS Mini Tube Screamer | 2.01 × 3.66 in (51 × 93 mm) | 248 × 3 rows | 217 × 3 rows |
| MXR sizeMXR Phase 90 | 2.32 × 4.37 in (59 × 111 mm) | 217 × 3 rows | 186 × 3 rows |
| BOSS compactBOSS DS-1 | 2.87 × 5.08 in (73 × 129 mm) | 186 × 3 rows | 155 × 3 rows |
| Large boxStrymon TimeLine | 6.75 × 5.1 in (171 × 130 mm) | 62 × 3 rows | 62 × 3 rows |
Dimensions and specs
| Width | 21 in (533 mm) |
|---|---|
| Depth | 16.5 in (419 mm) |
| Mounting surface | Holes |
| Size measured | Deck surfaceThe maker publishes the deck, not the outside frame. |
Published as: Length 21.0" (533 mm); Depth 16.5" (419 mm). Source: manufacturer specification. Checked 2026-11-05
Nearby sizes
- Smaller footprint
24 × 12.5 in (610 × 318 mm). It is 3 in (77 mm) wider and 4 in (101 mm) shallower than the TRIO 21. It holds 14 BOSS-size pedals in 2 rows with slim couplers, against 18 on the TRIO 21.
- Larger footprint
28 × 16.5 in (711 × 419 mm). It is 7 in (178 mm) wider than the TRIO 21 and just as deep. It holds 24 BOSS-size pedals with slim couplers, against 18 on the TRIO 21.