The Spirit Torino Valkyria Titanium is 64Ω. Its maker prints a sensitivity of 90.0 dB and never says whether that is per milliwatt or per volt, so this page reads it as per milliwatt — on that reading it needs 10 mW to reach 100 dB SPL, or 0.80 V across the drivers. If the figure is really per volt, it needs far more.
That is a moderate load. Most USB dongles handle it without complaint; the weakest phone outputs will run out of volume before they run out of quality. 261 of 280 sources here have enough headroom. The cheapest portable source that does the job is the Generic CX31993 dongles at $12.
This maker printed a decibel figure and no reference unit, so the number above is shown exactly as printed. Everything below reads it as per milliwatt, which is the commoner convention on a sheet that omits the unit — if it is really per volt, this headphone is about 12 dB harder to drive than the rest of this page assumes. The converter explains the difference.
Spirit Torino publishes a sensitivity of 90 dB and does not state whether that is per milliwatt or per volt — the spec sheet simply stops at the number.
Both readings are given here so you can judge for yourself. If that 90 dB is per milliwatt, the figures on this page are right as they stand. If it is per volt, the real sensitivity is 78.1 dB/mW — 12 dB lower at 64Ω — and everything above understates what these need by that much. The per-milliwatt reading is the one shown, because it is the more common convention on a spec sheet that omits the unit; treat it as an indication rather than a specification.
The maker adds a power recommendation of its own: Spirit Torino publishes "MAXIMUM SUPPORTED POWER: 4.000 mW". The value is written with a European thousands separator, so 4.000 mW = 4000 mW = 4 W; no load is attached to that figure, but the impedance row gives "IMPEDENCE: 64 ohm".
Source: spirittorino.com, spirittorino.com. How this data was built.
| As it is labelled | As printed | Tolerance | Standard |
|---|---|---|---|
| FREQUENCY RESPONSE | 18.35-000 hz calibrated on isophonic curves | not printed | not printed |
Spirit Torino prints 18.35-000 hz calibrated on isophonic curves for the Spirit Torino Valkyria Titanium, under the heading “FREQUENCY RESPONSE”. Source: spirittorino.com.
The row stands in the specification table on Spirit Torino’s own product page, between "WIRING LENGTH" and "MAXIMUM SUPPORTED POWER".
That line cannot be read as it stands. The unit is there and the row is in the right place, but the number is not a number: it is punctuated in a way that gives no single reading. Eighteen hertz to thirty-five thousand is the obvious guess and it is probably right — which is exactly why this site will not make it. Writing a guess into the table would turn a typing mistake on the maker’s page into a specification on this one, and then nobody could tell the two apart.
The row is also conditioned on something no other sheet in this database mentions: “calibrated on isophonic curves”. That is a reference to equal-loudness contours rather than a tolerance in decibels, so it does not make the range checkable either. Of the 490 models whose maker prints a range, 58 print the ±dB figure that would.
Only what the maker printed; maker by maker.
| Level | What it is | Power | Voltage | Current |
|---|---|---|---|---|
| 85 dB SPL | quiet background listening | 0.32 mW | 0.14 V | 2.2 mA |
| 95 dB SPL | normal listening | 3.2 mW | 0.45 V | 7.0 mA |
| 100 dB SPL | loud listening | 10 mW | 0.80 V | 12.5 mA |
| 105 dB SPL | very loud | 32 mW | 1.42 V | 22.2 mA |
| 110 dB SPL | peaks on dynamic music | 100 mW | 2.53 V | 39.5 mA |
Most people listen between 75 and 85 dB; the 100 dB row leaves room for peaks.
The 15 cheapest of the 280 sources here that reach 100 dB SPL into 64Ω with at least 10 dB of headroom and no known hiss or output-impedance problem with these headphones. All 280 sources, judged for these headphones.
| Source | Type | Price | Power into 64Ω | Headroom | Verdict |
|---|---|---|---|---|---|
| FiiO KA11 | USB dongle | $29 | 100 mW | +10 dB | Comfortable |
| ddHiFi TC35AL | USB dongle | $46 | 105 mW | +10 dB | Comfortable |
| ddHiFi TC35Air | USB dongle | $46 | 105 mW | +10 dB | Comfortable |
| Tempotec Sonata BHD Pro | USB dongle | $60 | 140 mW | +11 dB | Comfortable |
| JDS Labs Atom+ (2nd gen) | desktop amplifier | $99 | 675 mW | +18 dB | Comfortable |
| Schiit Magni Heresy | desktop amplifier | $99 | 1.3 W | +21 dB | Comfortable |
| ddHiFi TC44 Pro E2 | USB dongle | $99 | 125 mW | +11 dB | Comfortable |
| Schiit Magni+ | desktop amplifier | $109 | 1.1 W | +20 dB | Comfortable |
| Schiit Magni Unity | desktop amplifier | $119 | 1.2 W | +21 dB | Comfortable |
| JDS Labs Atom Amp 2 | desktop amplifier | $129 | 1.3 W | +21 dB | Comfortable |
| Tanchjim LUNA | USB dongle | $140 | 154 mW | +12 dB | Comfortable |
| FiiO K11 | desktop DAC/amp | $143 | 263 mW | +14 dB | Comfortable |
| Schiit Vali 3 | desktop amplifier | $149 | 830 mW | +19 dB | Comfortable |
| Topping L30 II | desktop amplifier | $149 | 2.0 W | +23 dB | Comfortable |
| PreSonus HP4 | desktop amplifier | $150 | 122 mW | +11 dB | Comfortable |
Hiss. At 101.9 dB/V these are sensitive enough to reveal a source's own noise floor. The noisiest source in the database, the Schiit Mjolnir 3, would put its hiss at roughly 10 dB SPL in these headphones — faintly audible in a silent room. Check your own source.
Output impedance. At 64Ω these want a source output impedance below 8.00Ω to satisfy the one-eighth rule; 34 of the 192 sources that publish one miss it. Check yours here.
250Ω · 96.0 dB · Moderate
See requirements →250Ω · 96.0 dB · Moderate
See requirements →250Ω · 96.0 dB · Moderate
See requirements →250Ω · 96.0 dB · Moderate
See requirements →250Ω · 96.0 dB · Moderate
See requirements →300Ω · 96.8 dB/mW · Moderate
See requirements →